GASKAP - A Galactic Spectral Line Survey with the Australian Square Kilometre Array Pathfinder
John Dickey, Naomi McClure-Griffiths, Steven Gibson, Hiroshi Imai, Paul Jones, Stezana Stanimirovic, Jacco van Loon, Andrew Walsh
GASKAP is a survey of the Milky Way Disk, Magellanic Clouds and Magellanic Stream, which will be carried out by the Australia Square Kilometre Array Pathfinder telescope (ASKAP). GASKAP will map the 21 cm line of atomic hydrogen (HI) and three 18 cm lines of the OH molecule, over a total area of 13020 square degrees. The survey will study the distribution of HI emission and absorption at unprecedented angular and velocity resolutions, and will provide detailed maps of both thermal OH emission/absorption and OH maser emission. The data will have high brightness temperature sensitivity and maps with many different resolutions can be synthesized simultaneously for different scientific applications. GASKAP has a wide spectrum of scientific goals, ranging from star formation to galaxy evolution, with particular focus on the thermal phases of the ISM, the exchange of matter and energy between the Disk and the Halo, and the dynamical and thermal state of gas in the Magellanic Stream.